Insecticide regulatory update

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

Kethane manufacturing phase-out

(Brian Olson, Dow AgroSciences, LLC; edited by John Wise)
Dow AgroSciences has decided to initiate a voluntary phase out and global exit of the Kelthane ® miticide business. Kelthane (dicofol) is a non-systemic, organochlorine miticide (acaricide) that has been used for almost 50 years to control mite pests in United States fruit crops such as apples, grapes and various other specialty crops. However, the United States and global market for Kelthane has been experiencing a steady decline for several years as many new mitcide products and other technologies have been introduced. In addition, Kelthane (dicofol) regulatory uncertainties and costs continue to escalate in key global geographies. Given these conditions, Dow AgroSciences can no longer justify a commercial rationale to remain in this business. Therefore, they will be ending Kelthane manufacturing in June of 2006 and will plan to sell out their entire inventory into channels of distribution during 2006.

Kelthane WSP or Kelthane MF produced in 2006, as well as inventory in the Distribution Channel (wholesale/retail) and with end-users, can under current understanding be distributed, sold and applied legally until all supplies are exhausted. Dow AgroSciences intends to support U.S. Federal and State registrations to facilitate depletion of Kelthane inventory by end users. Kelthane WSP and Kelthane MF will be removed from the 2005/06 Distributor product package exchange program; however these Kelthane brands will continue to participate in the Distributor inventory protection program for the 05/06 marketing year.

Proclaim 5SG pome fruit label

Proclaim (emamectin benzoate) is a new insecticide registered for use in pome fruits for control of leafrollers and leafminers and suppression of Oriental fruit moth and codling moth (first generation only), psylla and spider mites. Proclaim is an Avermectin-type compound that belongs to the Naturalyte class of insecticides. Because of its novel mode of action, it is expected to be a good rotation tool for resistance management. This translaminar (locally systemic) material has long residual inside the plant, and is aided by the addition of a horticultural spray oil (1 qt/100 gallons) or non-ionic surfactant (0.25% v/v). Because Proclaim is an ingestion material quickly absorbed into the plant, impact on natural enemies is minimized.

Lorsban 75WG supplemental label on apples

Lorsban 75WGis a new “low odor” formulation of the organophosphate insecticide chlorpyrifos , which could be of value to growers spraying in proximity to residential populations. The new supplemental label describes foliar applications from dormant or delayed dormant through petal fall in apples, for control of leafrollers, scale, Oriental fruit worm, codling moth and rosy aphid. There are several “Specific Use Restrictions” on the label that are especially important to note:

  • Do not apply after petal fall.
  • Post-bloom application to apples is prohibited.
  • Do not make more than two applications per year. In any given year, if a single foliar application of chlorpyriphos has been made at or prior to petal fall, then only one subsequent tree trunk application can be made in the same year.
  • Chlorpyriphos is also known to be toxic to honey bees, so applications should not be made while pollinators are in the orchard.

The work of Dr. Wise and Dr. Gut is funded in part by MSU‘s AgBioResearch.

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